When we first started the Ocean Unit, the students were taught that the ocean has four zones: the Sunlit, Twilight, Midnight (below called the Dark Zone), and Abyssal Zones.

I made a bulletin board in that classroom that illustrates these zones. As you know, each student is researching an ocean animal. They have illustrated their fish, mammal, or invertebrate and placed it on the bulletin board in the zone in which it lives.

I love having this visual as part of our classroom decor!